Improvement in eotaey blowees



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vall arranged and operating substantially as and for "the purposes setvforth.

CHARLES W. ISBELIL, OF NEW YORK, N. Y

Letters .Patent No. 75,635, dated March 17, 1868.

IMPROVEMENT IN ROTARY BLOWERS.

' dije tlgetnle `referat tu in tigen tsitts ttuitmn making etti nf itsstmt.

TO' ALL WHOM'IT MAY CONCERN: j

Beit known that I, CHARLES W.ISBLL, of the city, county, and State ofNew York, haveinvcnted a.

`certain new and useful Improvement on Blowing-Apparatus, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawing, forming part of this specification, and inwhichv Figure 1 represents an end elevation of a blowing-apparatusconstructed according to my improvement.

Figure 2, a vertical transverse section of the same; and

Figure 3, a horizontal section thereof through the line x :c in g. 1.

Like letters indicate corresponding parts throughout the severalfigures.

This improvement relates to blowing-apparatus of the character describedin Letters Patent ofthe United States (Nd-44,809) issued to W. I?.Mackensie,.of Jersey City, in the county of Hudson, and `State of NewJerT scy, and bearing date the 25th day of October, 1864; Y'and thenature of my invention consists 'in a novel 'inode of hanging the shaft,with or around which the vanos work, as au axis and support relativelythereto of the eccentric-drum, that, in being driven, gives to the vanestheir respective actions, and whereby friction is reduced, by securingto the drum bearings of a central or small `diameter within the circlewhich encompassesthe vanes shaft, and every facility obtained forlubricating from `the outside both shafts or bearings.

Referring to the accompanying drawing, A is the frame ofthe apparatus'.B B are the fans or vanos supported by the axle or shaft C, to which'theoncef said fansor vanes B may be rigidly attached by a fast sleeve, b,so as to revolve with the said shaft, or so as to give motion thereto,while the other vane, B', works freely thereon by means of a loosesleeve, b. In case of more than two vanes, also, all excepting the oneshould turn loosely Von the shaft C in order that they may adaptthemselves to the continuous change of angle which they assume in theirpassage through the drum D, as the latter, which serves to drive them,is rotated, say, 4by a pulley, E, said drum being represented as turningloosely on Yfixed shafts or gudgeons, I". These shafts F are shown ascarried by plates G, one at either end, and made vertically adjustabletomeet sagging or wear of the vanos in their cylinder II, by set-screws c,said plates being attachments tothe frame A, but adjust-able up and downthereon on slackening screw-bolts, d, which hold `them to the frame andfit through oblong slots in the plates G. I is what may be termed thecylindrical packing through `which the vanes pass in .their intersectionof the'drum.` is the air-inlet or opening to the cylinder, and K thedischarge-spout, or outlet.

The vanes shaft C turns in and is supported at either end by cranks orprojections L, made fast to the inner ends of the shafts or gudgeons F,by which means the shaft C need not pass through the outer ends of thedrum, thereby admitting of thclatter having arms or perforatedend-plates, e, from central bosses,f, which form the drum-bearings onthe shafts F. lThis mode of supporting the drum, as compared withbearings to it outside of the shaftC, materially reduces friction,`whileevery facility is afforded for lubricating both the revolving shaft Cand drum-bearings. v j

In other respects the action of the blower is or may be the same alsthat described in Letters Patent hereinbefore referred to, and it may beapplied to the same or any suitable puiposes, the eccentric position ofthe drinn D', relatively to the cylinder II, causing the vanos togradually project beyond the circumference of the drum, and then togradually recede, so as to-conform accurately tothe air-space of thecylinder, and to conduct the whole body of air therein to anddischargcit from the spout or outlet of the blower.

It may 'here be advisable to mention, in conclusion, that 'this myimprovement has no reference4 to a iixcd arrangement of the shaft C,which is so objectionable on account of wear to the boxes of the vanes,and didiculty attending the lubrication of such, while, by allowing-theshaft C to rotate, the wearis transferred to the outside bearings ofsaid shaft, and the loose vane or vanes thereon only have a smallturning or oscillating movement on the same, incidental to alteration inangle of said vane or vancs.

what I claim as my invention, and desire to secure by Letters Patent,is-

The revolving shaft C, having one of the vanos B rigidly attached andthe others loose thereon, and supported in journals in the arms L of thestationary shafts F, in combination with the drum D and cylinder H,

CHAS. W. ISBELL.

-Wi-tnesses: i,

J. W. Coeurs, Geo. W. REED.

